There are some options if one is open to some different ideas-
1) Marstrom "snail"- potentially used with a "spring" which is "wound" on drop or hoist with purchase system to reduce amount of "pull" necessary to hoist/drop
2) Furled spi (if furled horizontally could then drop/fold furled spi ala "A" sails on some monoslugs) - could "furl" vertically- potentially around a "cage" or lightweight CF "drum"- ideally this would be stored in the leeward hull- especially if the spi was flown off a bridle between the bows ;-)
3) Large "wheel" under tramp to "roll" spi up on quickly w/ minimal "pull" on line attached to wheel- could also be spring assisted- Spring could be wound on upwind leg perhaps?
4) Use a collapsible small "parachute/sea anchor" on halyard/retrieval line to provide motive force/assistance to launch/retrieve or wind spring
5) basket style "snuffer" ala monoslugs that slides up spi to "launch" and down over spi to "douse"- could then drop/fold snuffed spi at relative leisure.

No matter what this process will always be "slower" IMO than comparably equipped sloop due to fewer hands, arms,eyes, brains, attention span, etc.

Kirt